There's a lot to like about Trader Joe's. They've got unique products, fresh produce and that mysteriously delicious "cookie butter" spread. But the prices can be tricky. Kiplinger compared Trader Joe's prices with the prices of a few other popular stores. Here's their list of the best and worst buys at Trader Joe's.

Overall, Kiplinger found that Trader Joe's trumped most stores' prices. Here's how they ran their comparisons:

"...we wanted to find out what was actually a good deal at Trader Joe's and what wasn't. We compared its regular prices on a variety of items with the regular prices of similar items at Harris Teeter, Kroger, Walmart and Whole Foods. For the most part, we found that it's tough to beat Trader Joe's."

A few highlights from their "best buys" list:

Frozen meals

Speciality cheeses

Organic fruits and vegetables

Nuts and seeds

But they didn't win in every category. Here are a few of the "worst buys" at Trader Joe's:

Frozen fruit

Organic chicken

Organic milk

If you're a Trader Joe's regular, this list might help you decide what to skip on your next shopping trip. And if you're not a regular, some of the "best buys" might surprise you. Either way, it's interesting to see what's worth buying. Hit the link for Kiplinger's full list.